436 MR. C. B. CLARKE ON THE FERNS OF NORTHERN INDIA. 
Mishmee, Griffith. Assam, Griffith, Mrs. Mack, Jenkins.—Distrib. Tavoy, Malay 
Archipelago, South China. 
Involucres large, persistent, almost or quite touching each other. The rhachises of 
the pinnnles are arachnoid or paleaceous in the Assam examples, but not hirsute as 
Griffith has depicted. | 
2. D. scABRA, Wall. Cat. 2173; Hook. Sp. Fil. i. 80, t. 27 5; Hk. & Baker, Syn. Fil. 54. 
D. deltoidea, Hook. Sp. Fil. i. 80, t. 27 ^. .Dennstedtia deltoidea, Bedd. Ferns 
South. Ind. t. 258. | 
Himalaya; from Kumaon to Bhotan, alt. 4000-8000 feet, common. Khasia; alt. 4000- 
6000 feet, common.—Distrib. Ceylon, Malay Peninsula. 
Rhizome creeping, villous. Main rhachis scabrous, often wavy. Frond ovate or del- 
toid; pinnz often distant; surface beneath with scattered glistening hairs. Very 
variable in size, and not, by that character, to be distinguished from D. appendiculata— — | 
As to the synonym Sitolobiwm strigosum, J. Smith (adduced here in Hk. & Baker, Syn. 
Fil. 54), J. Smith says (Genera of Ferns, 102) that he meant thereby Davallia strigosa, 
Swartz; and in Historia Fil. 261, he refers the same species to Microlepia: many 
examples of Dicksonia scabra have been marked Microlepia strigosa in the Herbarium ; 
but it does not appear clear that they were so marked by the hand of J. Smith. 
3. D. ELWESII, Hk. & Baker, Syn. Fil. 54. Patania Elwesii, Bedd. Ferns, Suppl. 
t. 347. 
Sikkim; Lachen, alt. 8500 feet, H. J. Elwes; Choongtam, alt. 9000 feet, Sir J. D. 
-Hooker. = 
Glabrous, or the rhachis fibrillose. Frond large, lanceolate, elegantly cut. Ultimate 
segments oblong, entire, often somewhat clavate at the summit, which is entirely occupied 
by the sorus. Lower segments of the pinnule often divided; when barren, acute. 
4. D. APPENDICULATA, Wall. Cat. 65; Hook. Sp. Fil. i. 79, t. 27 0; Bedd. Ferns Brit. 
Ind. t.82; Hk. & Baker, Syn. Fil. 54. | 
North-west Himalaya; Kumaon, Gori valley, alt. 5500 feet, Strachey & Winterbottom ; 
banks of Vishnugunga above Panchkisar, alt. 8000-9000 feet, Edgeworth. Nepaul, 
Wallich. Sikkim; Lachen valley, Blanford & Elwes; Sinchul, alt. 8500 feet, N. Gamble. ` 
Rhachis of frond hairy. Frond oblong; pinne close together, their rhachises parallel. ` ` 
Surface of frond beneath with scattered hairs. ! 
10. HYMENOPHYLLUM, Linn. 
* Margin of frond entire, neither serrulate nor ciliate. ` B. 
1. H. resp, Wall. Cat. 170, as to the type sheet. Rhachis beneath with scattered ` 
lax rufous hairs.—Hook. Sp. Fil. 109, t. 384 ; Bedd. Ferns South. Ind. t.9; Hk. & ` 
Baker, Syn. Fil. 58. HM. macroglossum, v. d. Bosch, Hymen. "E: ar H. densum, oS 
Wall. Cat. E eet he Lee DEE 
